70results about How to "Guaranteed temperature control accuracy" patented technology

The invention discloses an energy adjusting and controlling method with low failure rate and saved energy for a double-system screw chiller unit, which comprises a starting stage control and an operation stage control for setting up the control cycle. In the operation stage control, two screw compressors are in a 75 percent or 100 percent operating state or in a standby state. In the operation stage, an energy demand of the double-system screw chiller unit is adjusted according to the difference between the measured temperature and the set temperature. When screw compressors are in a 75 percent or 100 percent operating state, the lubrication is sufficient and the energy efficiency ratio is high so as to solve the failure problems arising from the long operation of single screw compressor in a 25 percent or 50 percent operating state, reduce the working energy consumption, improve the working stability of the double-system screw chiller unit, prolong the service life of the double-system screw chiller unit and reduce the operation and maintenance cost of the double-system screw chiller unit. Though reducing the number of adjusting levels, the energy adjusting and controlling method can still ensure the temperature controlling precision and meet the needs of the users, which is particularly suitable for the double-system screw chiller unit.

The invention discloses a temperature and coupling running controlling method of a double-compressor and double-refrigerating circuit refrigerator. The temperature and coupling running controlling method comprises the following steps: picking up current temperatures of a priority control compartment and a secondary control compartment; and monitoring the startup-shutdown state of a compressor in the priority control compartment: if the compressor in the priority control compartment is in a shutdown state, carrying out logic comparison on the picked current temperature of the secondary control compartment and a set starting temperature, a set shutdown temperature and set temperature offsets E1 and E2 to control the compressor to start up or shut down; and if the compressor in the priority control compartment is in a startup state, carrying out logic comparison on the picked current temperature of the secondary control compartment and a set starting temperature, a set shutdown temperature and set temperature offsets E3 and E4 to control the compressor to start up or shut down. When the temperature and coupling running controlling method is applied to the double-compressor and double-refrigerating circuit refrigerator with energy coupling, simultaneous starting and refrigerating time, i.e. coupling running time, of two refrigerating circuits can be prolonged, and the running efficiency of a system is improved.

The invention relates to a thermostatic bath based on the mixed temperature control of cold and hot liquids, a main body thereof is a thermostatic bath body which adopts metal materials with large thermal conductivities and has a certain thickness; the thermostatic bath is characterized in that: the thermostatic bath is divided into a work area and a temperature regulation area, the middle is separated by a metal partition plate with a hole; a stirrer is provided with stirring paddles in both the temperature regulation area and the work area, horizontal stirring is implemented in the temperature regulation area, stirring on the vertical direction is implemented in the work area; an annular heat exchanger is arranged in the work area, the heat exchanger surrounds the stirring paddles; the side wall of the work area is provided with a hole and is connected with a return pipeline and a self-circulating pipeline; the side wall of the temperature regulation area is provided with a hole and is connected with a liquid injection pipeline. The thermostatic bath based on the mixed temperature control of cold and hot liquids of the invention can carry greater heat load, have large capacity, high precision and high anti-interference ability and facilitate the work of the heat exchanger in the internal temperature field thereof.

The invention provides a precious object low-temperature preservation system. The precious object low-temperature preservation system comprises an airtight space, and a refrigeration system consisting of a condenser, a refrigeration compressor, an evaporator and an air blowing component, wherein air return channels communicated with each other are respectively formed in the side walls and the bottom of the airtight space; an air inlet is formed in the air return channel in the bottom; an air flow stabilizing layer is arranged at the top of the airtight space; the evaporator is mounted at the top of the airtight space, and is communicated with the airtight space; and the condenser and the refrigeration compressor are mounted out of the airtight space. The precious object low-temperature preservation system can acquire temperature parameters in the airtight space in real time, and adjusts the temperature in the airtight space through the refrigeration system. Meanwhile, the special structure of the airtight space guarantees the control precision and uniformity of the temperature in the space, realizes intelligent temperature control, satisfies the preservation environmental requirements of precious objects, and accords with the requirements of product simpleness, stability and reliability of users.

The invention discloses a control method and a system for wet method leather manufacturing. By means of combination of hot air dying and drying-cylinder drying, base cloth is subjected to hot pressing and ironing at low temperature to improve surface quality of the base cloth; by means of three-section steam supply, trapezoidal utilization of energy is realized, fresh steam consumption is reduced while base cloth is dried, so that energy saving and consumption reduction are realized; the problem of safety in heating of conduction oil is solved by adoption of steam; by a multi-section heat supply control system, heat of steam condensate can be recycled completely, so that energy saving and consumption reduction are realized; owing to design of the control system, automatic production of a drying section is realized; in addition, adjustment of steam quantity according to operating conditions is realized so as to meet production requirements of different synthetic leather techniques.

The invention relates to a three-stage temperature control cooling water tank. The three-stage temperature control cooling water tank comprises a tank body for containing cooling water, wherein the interior of the tank body is divided into a first tank body, a second tank body and a third tank body by a first partition plate and a second partition plate; a first heating device is mounted in the first tank body, a drain pipe is mounted at the bottom, and a water return pipe and a water replenishing pipe are mounted at the top; a second heating device is mounted in the second tank body; a third heating device is mounted in the third tank body, an overflow pipe is mounted at the upper part of the side wall of the third tank body, a water supply pipeline is mounted at the lower part, the drain pipe and the overflow pipe are connected with a drainage pipe, the bottom of the first tank body is communicated with the bottom of the second tank body, and the top of the second tank body is communicated with the top of the third tank body. The three-stage temperature control cooling water tank provided by the invention is designed against the temperature control range of the cooling water tank, which is required for the experiments, fully utilizes the characteristic of rich industrial water sources in a power plant, and directly uses a method of injecting water at normal temperature to cool the circulating cooling water; compared with the traditional cooling water tank, a compressor is omitted, so that the space is saved.

The invention relates to a device water supply temperature control apparatus and a control method. The apparatus comprises a water supply unit for providing cooling water; a temperature control unit for detecting the temperature of the cooling water provided by the water supply unit, and modulating the temperature according to the water demand of a water equipment unit to provide circuit water ofprecise temperature control for the water equipment unit; and a mixed flow temperature homogenizing unit disposed between the water supply unit and the temperature control unit for homogenizing the cooling water provided by the water supply unit. According to the invention, the influence of temperature sudden changes as an external disturbance factor on the heat exchange process of the temperaturecontrol unit is avoided by the connection of the mixed flow temperature homogenizing unit in the case that a facility system is not good enough, such that the temperature control precision of the temperature control unit is ensured to improve the adaptability of the temperature control unit to harsh facility conditions.

The invention discloses a temperature control system for the unfreezing and heat preservation of biological product liquid medicine, and the system comprises a water-bath heating module and an electric heating module, wherein the water-bath heating module comprises an industrial steam heating pipe, a freezing water pipe, a water supplement pipe, and a plate heat exchanger. The industrial steam heating pipe, the freezing water pipe and the water supplement pipe are respectively connected with the plate heat exchanger. The electric heating module comprises a heating tank and an electric heating pipe system, and the electric heating pipe system is connected with the heating tank. The interior of the heating tank is vertically and uniformly provided with a plurality of heating pipes. The water-bath heating module is used for achieving the quick rise of temperature, and improving the temperature response speed. A heat exchanger industrial steam pipe is connected with an industrial steam pneumatic angle valve, thereby achieving a purpose of stopping the industrial steam heating when the industrial steam is nearly heated to designed temperature. The freezing water pipe is used for achieving the cooling of the plate heat exchanger. During the approaching of the designed temperature, the electric heating module can effectively control the precision of temperature rise through controlling the number of heating tube switches in the heating tank and the heating time.

The invention relates to an air conditioning system and particularly relates to an integrated high-temperature frequency-variable heat pump heating air conditioning system. The air conditioning system comprises a frequency-variable intermediate gas-supplementing scroll compressor, a plate type heat exchanger, a finned condenser, a finned evaporator, a main thermostatic expansion valve, a normally-opened electromagnetic valve, a gas-liquid separator, a drying filter, a normally-closed electromagnetic valve, a branch thermostatic expansion valve, an axial flow condensation fan, an axial flow evaporation fan, a pipeline, a high-pressure detection valve, a low-pressure detection valve, a high-pressure switch, a low-pressure switch and a liquid observing mirror. In order to overcome the disadvantages of the prior art, the integrated high-temperature frequency-variable heat pump heating air conditioning system is adopted; the compressor adopts a special frequency-variable intermediate gas-supplementing scroll compressor for a high-temperature heat pump; the displacement of the compressor is controlled by adjusting the operation frequency of the compressor, and the heating capacity on a condensation side is dynamically adjusted, so that the inner temperature of a curing barn is controlled, and the temperature control accuracy of the curing barn is ensured.

The invention provides a temperature control method and device for an immersion lithography machine, and the method comprises the steps: carrying out the heat exchange between a PCW and a lithographymachine UPW through a heat exchanger, heating the UPW through a heater, so as to heat the UPW, and carrying out the rough adjustment of the temperature of the UPW, determining a UPW temperature track,a PCW flow control model and a heater power control model based on the detected three temperature values and the UPW temperature control target; adaptively correcting a flow control model of the PCWand a power control model of the heater by adopting a fuzzy rule; introducing the coarsely adjusted UPW into a photoetching machine through a remote transmission pipeline, dividing the UPW into two paths of UPW injection liquid after being adjusted by a semiconductor chilling plate, and respectively heating the two paths of UPW injection liquid through two heaters; and when the UPW temperature isfinely adjusted, the adjustment amount of the refrigeration sheet is determined by the power of the two heaters for two paths of UPW liquid injection, the flow of the two paths of UPW liquid injectionand the temperature set values of the two paths of UPW liquid injection. According to the invention, the temperature control precision of the photoetching machine is improved.

The invention discloses a two-stage heat-exchanging precise temperature control system. The two-stage heat-exchanging precise temperature control system comprises a primary-stage heat exchanger and asecondary-stage heat exchanger, wherein the primary-stage heat exchanger and the secondary-stage heat exchanger are connected in series in a first circulating fluid side and are connected in parallelin a second circulating fluid side; a first circulating fluid and a second circulating fluid are subjected to heat exchange in the primary-stage heat exchanger to be primarily adjusted, and are subjected to heat exchange in the secondary-stage heat exchanger to be finely adjusted; by adjusting a factory affair water flow regulating valve, the temperature precision of the second circulating fluid is controlled, thereby ensuring the accuracy of the first circulating fluid temperature control precision to be up to minus or plus 0.01 DEG C; and meanwhile, the two stages of heat exchangers are arranged separately, so that the universality is high, and the special requirements of the first circulating fluid is met.

The invention relates to a heat-preserving furnace for magnesium alloy die casting. The furnace comprises a heat-preserving furnace body. A first crucible is arranged in the heat-preserving furnace body. The heat-preserving furnace for magnesium alloy die casting further comprises an electric heating furnace, a second crucible is arranged in the electric heating furnace, and the first crucible and the second crucible are communicated through a siphon pipe. The heat-preserving furnace utilizes the siphon principle to keep liquid level and temperature constant and greatly improves quality of magnesium alloy die casting pieces in an allowable range.

The invention discloses a CSTR temperature fault-tolerant control system based on double heat exchangers. The CSTR temperature fault-tolerant control system comprises a temperature controller and a coil pipe flow controller. The input end of the temperature controller is connected with a temperature detection device. A coil pipe flow regulating valve is connected with the output end of the temperature controller. A clamp sleeve flow regulating valve is connected with the output end of the coil pipe flow controller. The CSTR temperature fault-tolerant control system also comprises a fault-tolerant controller, a fault alerter and a fault information displayer. The input end of the fault-tolerant controller is connected with a coil pipe flow detection device and a clamp sleeve flow detection device. The temperature controller and the coil pipe flow controller are connected with the fault-tolerant controller. The temperature detection device is connected with the input end of the fault-tolerant controller. The invention also discloses a CSTR temperature fault-tolerant control method based on the double heat exchangers. The CSTR temperature fault-tolerant control system is high in control precision, high in heat exchange efficiency and low in heat-carrying medium consumption so that working safety and reliability of a CSTR are enhanced and economic benefit produced by reaction of the CSTR is enhanced.

The invention discloses a spindle oil cooling system. The system comprises a spindle oil cooling device, an oil inlet pipeline, an oil outlet pipeline, an oil inlet induction probe and an oil outlet induction probe. The spindle oil cooling device comprises an evaporator. The oil outlet end of the evaporator communicates with the oil outlet pipeline, and the spindle cooling device further comprisesan economizer, a liquid inlet pipeline, a liquid outlet pipeline, a bypass adjusting valve and a liquid inlet induction probe. The economizer is in heat exchange communication with the evaporator, the oil inlet end of the economizer communicates with the oil inlet pipeline, the liquid inlet pipeline communicates with the liquid inlet end of the economizer, the liquid outlet pipeline communicateswith the liquid outlet end of the economizer, the bypass adjusting valve is arranged between the liquid inlet pipeline and the liquid outlet pipeline, and the liquid inlet induction probe is arrangedon the liquid inlet pipeline. According to the spindle oil cooling system, waste heat of spindle oil can be recycled, and used for heating cutting liquid, electric heating of a cutting liquid coolingmachine is reduced, the aim of energy saving is achieved, meanwhile, temperature control precision of spindle oil can be ensured, the energy use rate is improved, and the invention further provides aspindle oil temperature control method and a machine tool cooling machine system with the spindle oil cooling system.